from flask import session, current_app, g

from info.models import User


# 自定义过滤器
def index_filter(index):
    if index == 0:
        return 'first'
    elif index == 1:
        return "second"
    elif index == 2:
        return "third"
    else:
        return ''
import functools


def login_required(f):
    @functools.wraps(f)
    def wrapper(*args, **kwargs):
        user_id = session.get('user_id')
        user = None
        if user_id:
            try:
                user = User.query.get(user_id)
            except Exception as e:
                current_app.logger.errno(e)

        g.user = user
        return f(*args, **kwargs)

    # wrapper.__name__ = f.__name__
    return wrapper